Pressure-roller smoothing apparatus for circular objects, particularly axle journals



Mar. 3, 1925. 1,528,672

A. LElPERT PRESSURE ROLLER SMOOTHING APPARATUS FOR CIRCULAR OBJECTS, PARTICULARLY AXLE JOURNALS Filed Dec. 20. 1921 2 Sheets-Sheet 1 A Z A\\\\\\\ I Mar. 3, 1925.

1,528,672 A. LEIPERT OO'l'HING APPARATUS FOR CIRCULAR 2 Sheets-Sheet 2 PRESSURE ROLLER SM OBJECTS, PARTICULARLY AXLE JOURNALS Filed D60. 20, 1921;

50 guide nuts (1 and e,

' 'Paeneara a, 1925.

UNITED STATES ALFRED LEIPERT,

OF ISSEN, ASSIGNOR- T FRIED. KRUPP AKTIENGEELL- Y SCH AFT, OF ESSEN-ON-THE-RUHB. GERMANY.

PRESSURE-ROLLER SMOOTHING APPAR-ATUS FOB CIRCULAR OBJECTS, PARTICULARLY AXLE JOURNALS.

Application filed December 20, 1921. Serial'No. 523,716.

T 0 all whom it may concern:

Be it known that I, ALFRED LEIPERT, residing at Essen, Germany, a citizen of the German Republic, have invented a certain 5 new and useful Im rovement in Pressure- Roller Smoothing l pparatus for Circular Objects, a Particularly Axle Journals, of which the following is a specification.

The present invention relates to pressure roller smoothing apparatus for circular objects mounted to rotate on centers in the frame of the apparatus, particularly aslejournals, and the object of the invention is x to afi'ord as perfect a relief as possible to the centers from the pressure of the p ressure rollers which are likewise mouiited on the frame of the apparatus.

The invention will be described with reference to an embodiment of the subjectanatter,

of the invention, intended for smoothing the axle-journals of a set of railway wheels, shown by way of example in the accompanying drawing in which- Figure 1 is an end view, partially in section, of the smoothing apparatus,

Figure 2 is a section on the line 22 of Figure l'looking from the left and Figure 3 is a general side view of the smoothing apparatus viewed from the same side as in Figure 2.

On the frame A of the smoothing apparatus which is fitted after the manner of a lathe with a fixed headstock A carrying a coupling disc M provided with a center mk and a movable headstock A- carrying a center a is mounted a travelling slide B which can be moved longitudinally of the apparatus by means of a spindle C. On the slide B are mounted two supporting +0 members D and E which can be moved 'towards opposite sides at right angles to the direction of movement of the slide B. The supporting members D and E are moved longitudinally by a screw spindle F which 5 is provided with a rightand left-handed screw-thread and is adapted to rotate in the slide'B, and to freely move in'its longitudinal direction within definite limits. The said screw-threaded spindle F engages two which are fixedto the supporting members. -In one of the two supporting members, D, is mounted a pressure roller G, the axis of rotation of which is parallel with the direction of the longi tudinal movement of the slide B and is positioned at the same height as the centers 0. and m of the smoothing apparatus "on which the circular objects to be smoothed are mounted to rotate. The other supporting member E is rotatably mounted by means of a pin e the axis of which is likewise at the same height as the centers a? and m,

and is parallel with the direction of longitudinal movement of the slide B, a holder H carrying two other pressure rollers J and K. the axes of which are parallel with the axis of rotation of the roller G.

The set of wheels, the axle-journals of which are to be smoothed, is chucked, as shown in Figures 2 and 3, between the centers a? and m of the apparatus and caused to rotate by the coupling disc M mounted on the fixed headstock A". After the pressure rollers G, J and K mounted on the supporting members D and E, have been pressed by means of the screw spindle F against the surface of one of the axle-journals which are to be smoothed, the pressure rollers are set in rotation by the rotating axle-journal and also moved along the surface. of the axle-journal to be smoothed by the slide B which is simultaneously moved longitudinally of the axle-journal by means of the spindle C The above described apparatus possesses firstly the advantage that not only the desired smoothing action can be secured on the cylindrical peripheral surface of the axle-journal but also without difliculty in the angles limiting said surface. Furthermore, owing to the, rollers J and K being mounted in the holder H, and the screw spindle F being freely movable in its hearings in longitudinal direction, the additional advantage is afi'orded that it can be reckoned on with certainty that all the three rollers (G, J and K) are always simultaneously in contact. with the axle-journal. This is also the case in particular when, for example, owing to wear of the guidefor the slide a difference in the respective levels! of the rollers and the centers, takes place; or when for example, owing to, the pull'of the belt, or from any other cause, the axis of rotation of the work is shifted laterally out of its central position. The simultaneous contact of the pressure rollerscauses any one-sided pressure on the, axle-journal to be avoided and'consequently ensures the centers being as completely as possible relieved of strain.

Claims: y

1. A pressure roller smoothing apparatus comprising a frame, means mounted on said frame for axially centering a rotating cirrotation of said body.

2. A pressure roller smoothing apparatus comprising a frame, means mounted onsaid frame for axially centering a rotating circular body, three pressure rollers, means for independently supporting one of said rollers in contact with the lateral surface of said body, a connecting'bearing member for the other two rollers, means for pivotally supporting said bearing member substantially opposite said first named roller, whereby its two rollers are in contact with said body, a screw spindle having two screw threaded portions of opposite pitch bearing means for rotatably Jsupporting said spindle, said spindle being longitudinally movable in said bearing means, each of said roller supporting means being under I the control of one of the screw portions of said spindle whereby they are adjustable transversely to the axis of rotation of said body.

3. A pressure roller smoothing apparatus comprising a frame, means mounted 01f said frame for axially centering a rotating cylindrical body, three pressure rollers, the

axes of said rollers being normally posidrical body, three pressure rollers,'the axes of said rollers being normally positioned as the vertices of an isosceles triangle whose altitude intersects-the axis of said body and is at right angles thereto, a connecting hearing member for the two rollers whose axes are positioned as the base Vertices of the triangle, means for pivotally supporting said bearing member at a point midway between its two rollers, means for supporting the other roller, a screw spindle having two screw threaded portions of opposite pitch. bearing means for rotataby supporting said spindle, said spindle being longitudinally movable in saidbearing means,*each of said roller supporting means being under the control of one of the screw portions of said spindle whereby they are adjustable trans versely to the axis of rotation of'said body.

The foregoing specification signed at Essen, Germany, this 19th day of November, 1921.

ALFRED LEIPER'II. 

